body{
    height: 1500px;
}
ul li{
    list-style-type: none;
}
#container{
    width: 1300px;
    height: 560px;
    position: relative;
    overflow: hidden;
    border-radius: 10px;
}
.item{
    position: absolute;
}
.item img{
    width:100%;
    height: 100%;
}
#tabs{
    position: absolute;
    right: 30px;
    bottom: 20px;
}
.tab{
    float: left;
    margin-right: 10px;
    width: 6px;
    height: 6px;
    border: 3px splid rgba(184,178,182,0.8);
    border-radius: 50%;
    background: #989196;
    cursor: pointer;
}
.active{
    background: #fff;
    border-color: #999497;
}
.btn{
    position: absolute;
    top: 50%;
    margin-top: -35px;
    width: 40px;
    height: 70px;
    color: #d6d3d5;
    font-size: 36px;
    line-height: 70px;
    text-align: center;
    cursor: pointer;
}
.btn:hover{
    background: rgba(127, 120, 125, 0.8);
    color: #fff;
}
.pre{
    position:absolute;
    left: 50px;
    border-radius: 5px;
}
.next{
    position:absolute;
    right: 50px;
    border-radius: 5px;
}

/*返回顶部CSS样式*/

#back{
    width: 50px;
    height: 50px;
    position: fixed;
    right: 50px;
    bottom: 10px;
    background-image: url(../images/back.png);
    background-repeat: no-repeat;
}